There are
2,894 mi
from Vacaville, CA to Norwalk, CT
That's the driving distance. It would take 2 days 2 hours to go from Vacaville, California to Norwalk, Connecticut.
The flight distance (direct flight from Vacaville, CA to Norwalk, CT) is 2,554.65 mi.
2,894 mi = 3.22 kms